Lockheed Hudson

The Lockheed Hudson was an American-built light bomber and coastal reconnaissance aircraft built initially for the Royal Air Force shortly before the outbreak of the Second World War and primarily operated by the RAF thereafter.

The Hudson was a military conversion of the Lockheed Model 14 Super Electra airliner.


Model 414

Company designation for the military A-28 / A-29 and Hudson variants.

Hudson I

Production aircraft for the Royal Air Force (RAF); 351 built and 50 for the Royal Australian Air Force (RAAF).

Hudson II

As the Mk I but with spinnerless constant speed propellers; 20 built for the RAF and 50 for the RAAF.

Hudson III

Production aircraft with retractable ventral gun position; 428 built.

Hudson IIIA

Lend-lease variants of the A-29 and A-29A aircraft; 800 built.

Hudson IV

As Mk II with ventral gun removed; 30 built and RAAF Mk I and IIs were converted to this standard.

Hudson IVA

52 A-28s delivered to the RAAF.

Hudson V

Mk III with two 1,200 hp (890 kW) Pratt & Whitney R-1830-S3C4-G Twin Wasp engines; 409 built.

Hudson VI

A-28As under lend-lease; 450 built.


US Military designation powered by two 1,050 hp (780 kW) Pratt & Whitney R-1830-45 engines; 52 lend-lease to Australia as Hudson IVA.


US Military designation powered by two 1,200 hp (890 kW) Pratt & Whitney R-1830-67 engines, interiors convertible to troop transports; 450 lend-lease to RAF/RCAF/RNZAF as Hudson VI; 27 units passed to the Brazilian Air Force.


US Military designation powered by two 1,200 hp (890 kW) Wright R-1820-87 engines; lend lease version intended for the RAF, 153 diverted to United States Army Air Forces (USAAF) as the RA-29 and 20 to the United States Navy (USN) as the PBO-1.


as A-29 but with convertible interiors as troop transports; 384 lend-lease to the RAF/RAAF/RCAF/RNZAF Chinese Air Force as Hudson IIIA, some retained by USAAF as the RA-29A.


24 of the 153 A-29s retained by the USAAF converted for photo-survey.


Gunnery trainer version of the A-29 powered by two Wright R-1820-87 engines, 217 built.


Navigational trainer version with dorsal turret removed, 83 built.


Provisional designation changed to A-29A.


Twenty former RAF Hudson IIIAs repossessed for use by Patrol Squadron 82 (VP-82) of the USN





44 ft 4 in (13.51 m)


65 ft 6 in (19.96 m)


11 ft 10 in (3.61 m)

Wing area

551 sq ft (51.2 m2)

Empty weight

11,630 lb (5,275 kg)

Gross weight

17,500 lb (7,938 kg)


2 × Wright GR-1820-G102A Cyclone 9-cylinder radial engines, 1,100 hp (820 kW) each


Maximum speed

246 mph (396 km/h, 214 kn) at 6,500 ft (2,000 m)

Cruise speed

220 mph (350 km/h, 190 kn)


1,960 mi (3,150 km, 1,700 nmi)

Service ceiling

25,000 ft (7,600 m)

Rate of climb

2,180 ft/min (11.1 m/s)



2 × .303 in (7.7 mm) Browning machine guns in dorsal turret

2× .303 Browning machine guns in nose


1,400 lb (640 kg) of bombs or depth charges.



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